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A preliminary study of deep learning-based reconstruction specialized for denoising in high-frequency domain: usefulness in high-resolution three-dimensional magnetic resonance cisternography of the cerebellopontine angle

  • Diagnostic Neuroradiology
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Abstract

Purpose

Deep learning-based reconstruction (DLR) has been developed to reduce image noise and increase the signal-to-noise ratio (SNR). We aimed to evaluate the efficacy of DLR for high spatial resolution (HR)-MR cisternography.

Methods

This retrospective study included 35 patients who underwent HR-MR cisternography. The images were reconstructed with or without DLR. The SNRs of the CSF and pons, contrast of the CSF and pons, and sharpness of the normal-side trigeminal nerve using full width at half maximum (FWHM) were compared between the two image types. Noise quality, sharpness, artifacts, and overall image quality of these two types of images were qualitatively scored.

Results

The SNRs of the CSF and pons were significantly higher with DLR than without DLR (CSF 21.81 ± 7.60 vs. 15.33 ± 4.03, p < 0.001; pons 5.96 ± 1.38 vs. 3.99 ± 0.48, p < 0.001). There were no significant differences in the contrast of the CSF and pons (p = 0.225) and sharpness of the normal-side trigeminal nerve using FWHM (p = 0.185) without and with DLR, respectively. Noise quality and the overall image quality were significantly higher with DLR than without DLR (noise quality 3.95 ± 0.19 vs. 2.53 ± 0.44, p < 0.001; overall image quality 3.97 ± 0.17 vs. 2.97 ± 0.12, p < 0.001). There were no significant differences in sharpness (p = 0.371) and artifacts (p = 1) without and with DLR.

Conclusion

DLR can improve the image quality of HR-MR cisternography by reducing image noise without sacrificing contrast or sharpness.

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Abbreviations

3D:

Three-dimensional

DCT:

Discrete cosine transform

DLR:

Deep learning-based reconstruction

FASE:

Fast asymmetric spin-echo

FWHM:

Full width at half maximum

HR:

High-spatial resolution

SNR:

Signal-to-noise ratio

T1WI:

T1-weighted image

T2WI:

T2-weighted image

CNR:

Contrast-to-noise ratio

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Funding

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Authors and Affiliations

Authors

Contributions

All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Hiroyuki Uetani, Tadashi Hamasaki, Machiko Tateishi, Kosuke Morita, Akira Sasao, and Seitaro Oda. The first draft of the manuscript was written by Hiroyuki Uetani, and all authors commented on the previous versions of the manuscript. All authors read and approved the final manuscript.

Conceptualization: Hiroyuki Uetani and Takeshi Nakaura

Data collection: Hiroyuki Uetani, Tadashi Hamasaki, Machiko Tateishi, Kosuke Morita, Akira Sasao, and Seitaro Oda

Methodology: Hiroyuki Uetani, Takeshi Nakaura, Mika Kitajima, and Yuichi Yamashita

Formal analysis and investigation: Hiroyuki Uetani, Takeshi Nakaura, Mika Kitajima, and Machiko Tateishi

Writing—original draft preparation: Hiroyuki Uetani

Writing—review and editing: Takeshi Nakaura, Mika Kitajima, Osamu Ikeda, and Yasuyuki Yamashita

Supervision: Takeshi Nakaura, Mika Kitajima, Osamu Ikeda, and Yasuyuki Yamashita

Corresponding author

Correspondence to Hiroyuki Uetani.

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Conflict of interest

Yuichi Yamashita is an employee of Canon Medical Systems. The other authors declare that they have no conflicts of interest.

Ethical approval

All procedures followed the clinical study guidelines of the ethics committee of Kumamoto university hospital (Kumamoto, Japan), and they were approved by our institutional review board.

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For this type of study, formal consent is not required.

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Uetani, H., Nakaura, T., Kitajima, M. et al. A preliminary study of deep learning-based reconstruction specialized for denoising in high-frequency domain: usefulness in high-resolution three-dimensional magnetic resonance cisternography of the cerebellopontine angle. Neuroradiology 63, 63–71 (2021). https://doi.org/10.1007/s00234-020-02513-w

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  • DOI: https://doi.org/10.1007/s00234-020-02513-w

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